Clippard, 30, owns a 2.79 ERA in 37 appearances for the A's. He has posted a 2.65 career ERA in seven seasons since becoming a full-time reliever, saving 32 games as Washington's closer in 2012 and another 17 this season for the A's.
In New York, he would figure to slot behind Familia as the Mets' primary setup man. Given his extreme reverse platoon splits, Clippard would also ease pressure from Sean Gilmartin and Alex Torres against left-handed hitters. And he would give the club a measure of security should Familia, who has blown each of his last two save attempts, continue to falter.